varArr = [[0, 1, 2, 3], ['a', 'b', 'c'], [True, False, None], None, 3.14, 'good']
print(varArr)
varArr0 = varArr[0]
print(varArr0)
varArrLast = varArr[-1]
print(varArrLast)

varArr0[1:3] = []
print(varArr)
print(varArr0)
print(id(varArr[0]), 'id(varArr[0])')
print(id(varArr0), 'id(varArr0)')

varArrLast = varArrLast.replace('o', 'O')
print(varArr)
print(varArrLast)
print(id(varArr[-1]), 'id(varArr[-1])')
print(id(varArrLast), 'id(varArrLast)')
